State officials announced Thursday that certain purchases of medical cannabis are now exempt from sales taxes, under the law approved by voters this month that legalized recreational pot in California.

Under the new law known as Proposition 64, a 15 percent excise tax will be imposed in January 2018 upon purchasers of all marijuana and marijuana products, including medical cannabis. A tax on cultivators will also be imposed.

Until then, the tax holiday goes to people who make purchases with a medical marijuana identification card from the California Department of Public Health.

Quietly on election night, overshadowed by the epic battle between blue and red, the map of America grew greener. Voters in four states — California, Massachusetts, Nevada and Maine — chose to legalize recreational marijuana. In Florida, Arkansas, Montana and North Dakota, ballot measures passed allowing pot to be used for medical purposes. (Only Arizona bucked the trend, saying no to recreational weed).

About 60 percent of Americans now live in a state where cannabis is legal or soon to be legal in some form. And with marijuana use on a steady march toward normalization, if not outright national legalization, the booming cannabis industry appears bound for even greater growth.

Shipping marijuana via the mail is always a dicey proposition. There is nothing legal about it—the U.S. Postal Service is a federal entity, and federal law trumps state law, making even an in-state cannabis delivery illegal—and tales of dummies literally writing their own indictment on the envelope abound.

And even if the police don’t show up at your door when you were expecting that package of contraband, there’s a serious probability your shipment still disappears, without ever falling into the hands of police. It might have been stolen by the likeliest suspects of all: the government employees handling the mails.

Postal workers discover marijuana in the mail with reliable frequency. USPS found 34,000 pounds of mailed cannabis in 2015, according to the U.S. Postal Inspection Service—a figure that’s in fact significantly down from the 47,000 pounds found in 2013, the last year before recreational marijuana retail shops opened up in Washington and Colorado—and about 1,000 people are arresting for mailing drugs or drug money every year.

The bad news is that there’s already a lot wrong with how Florida is choosing to carry out the will of the voters.

Amendment 2, Florida’s new medical marijuana law, is effective on Jan. 3, 2017, but it will be will be many months after that before the first patients receive any cannabis. Exact regulations for the cultivation and selling of which are yet to be determined, but the details may not matter: It’s going to be very hard indeed for even very sick people to acquire any cannabis at all, under initial rules proposed by the state Health Department’s “Office of Compassionate Use.”

Both Nashville and Memphis passed citywide ordinances earlier this year decriminalizing the possession of marijuana in small amounts. The goal of these measures is to prevent otherwise law-biding citizens from being entered into the criminal justice system simply for holding a little weed. In doing so, officials hoped that law enforcement will have more time to focus on more pressing issues, like rape, murder and all of the other monstrous indiscretions that typically frighten the majority of civil society.

However, Tennessee Attorney General Herbert Slatery claims the decriminalization ordinances are worthless in the eyes of the state. In a recent opinion, Slatery said the two cities could not give their respective police departments the freedom to issue small fines to those caught in possession of up to a half ounce of marijuana because that would go against the grain of state law.

No sooner had Denver become the first city in the country to allow adult-use marijuana consumption at bars, cafes and restaurants than foes began concocting ways to undermine it.

Fifty-four percent of Denver voters supported Initiative 300 on Election Day last week. Businesses can now pursue a special license to allow on-site cannabis consumption, subject to some strict rules as well as buy-in from the local merchants’ association.

Whichever business is the first to win a permit would become the first public place in America where cannabis use is strictly allowed that is not also a marijuana dispensary. Most legalization measures across the country include outright bans on public consumption, with violators subject to a fine. To date, the only dispensaries that have on-site consumption permits are in San Francisco.